How can I change FOV

[Dori12]

FOV의 값을 변경하는 법이 뭔가요?
저는 zoomfactor의 값을 변경해봤습니다.
그러나 기본값에서 축소 확대만 가능할 뿐이고 FOV를 기본값보다 증가시키지는 못합니다.
저는 FOV를 마음대로 바꾸고 싶습니다.
제발 도와주시기 바랍니다. 감사합니다.

How do I change the value of FOV?
I changed the value of the zoomfactor.
However, it only allows zooming in by default and does not increase the FOV beyond the default.
I want to change FOV freely.
Please help me. Thank you.

[lawwong]

"Each Camera that is rendering to the device automatically replaces the FOV of the Camera with the FOV that the user input in the software settings for each VR SDK. The user cannot change the field of view during runtime, because this behaviour is known to induce motion sickness."
https://docs.unity3d.com/Manual/VROverview.html#UnderstandingTheCamera

What is the use case you need to change the FOV?
If you want to change the FOV only for preview, you have to add non-VR camera (but with VR tracking), which will not render into HMD.
https://imgur.com/a/99ChA